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Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2026-50388)

high Nessus Plugin ID 326353

Synopsis

The remote Oracle Linux host is missing a security update.

Description

The remote Oracle Linux 7 / 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-50388 advisory.

 - rtmutex: Use waiter::task instead of current in remove_waiter() (Keenan Dong) [Orabug: 39706958] {CVE-2026-43499}
 - net/sched: fix pedit partial COW leading to page cache corruption (Rajat Gupta) [Orabug: 39680880] {CVE-2026-46331}
 - net: skbuff: fix missing zerocopy reference in pskb_carve helpers (Minh Nguyen) [Orabug: 39619389] {CVE-2026-52943}
 - net: fix fanout UAF in packet_release() via NETDEV_UP race (Yochai Eisenrich) [Orabug: 39250953] {CVE-2026-31504}
 - net: tap: NULL pointer derefence in dev_parse_header_protocol when skb->dev is null (Cezar Bulinaru) [Orabug: 39526882] {CVE-2022-50073}
 - arm64: errata: Mitigate TLBI errata on various Arm CPUs (Mark Rutland) [Orabug: 39548666] {CVE-2025-10263}
 - ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (Eric Dumazet) [Orabug: 39300926] {CVE-2026-43037}
 - batman-adv: hold claim backbone gateways by reference (Haoze Xie) [Orabug: 39262375] {CVE-2026-31657}
 - smb: client: reject userspace cifs.spnego descriptions (Asim Viladi Oglu Manizada) [Orabug: 39463669] {CVE-2026-46243}
 - ptrace: slightly saner 'get_dumpable()' logic (Linus Torvalds) [Orabug: 39384275,39391459] {CVE-2026-46333}
 - net: skbuff: propagate shared-frag marker through frag-transfer helpers (Hyunwoo Kim) [Orabug:
 39368828,39441326] {CVE-2026-43503,CVE-2026-46300}
 - net: skbuff: preserve shared-frag marker during coalescing (William Bowling) [Orabug: 39368828] {CVE-2026-46300}
 - nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (Jeff Layton) [Orabug: 39167617,39368718] {CVE-2026-31402}
 - scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (Maurizio Lombardi) [Orabug:
 38985173,39368732] {CVE-2026-23216}
 - scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (Maurizio Lombardi) [Orabug:
 38970455,39368774] {CVE-2026-23193}
 - xfrm: esp: avoid in-place decrypt on shared skb frags (Kuan-Ting Chen) [Orabug: 39334580,39367147] {CVE-2026-43284}
 - x86/CPU/AMD: Add a fix for AMD-SB-7052 (Prathyushi Nangia) [Orabug: 39218897] {CVE-2025-54518}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2026-50388.html

Plugin Details

Severity: High

ID: 326353

File Name: oraclelinux_ELSA-2026-50388.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/10/2026

Updated: 7/10/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.36

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-43499

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:oracle:linux:kernel-uek-doc, p-cpe:/a:oracle:linux:kernel-uek-debug, cpe:/o:oracle:linux:8, cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:kernel-uek-container, p-cpe:/a:oracle:linux:kernel-uek-devel, p-cpe:/a:oracle:linux:kernel-uek-tools, p-cpe:/a:oracle:linux:kernel-uek, cpe:/o:oracle:linux:8:10:baseos_patch, p-cpe:/a:oracle:linux:kernel-uek-debug-devel, p-cpe:/a:oracle:linux:kernel-uek-container-debug

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/10/2026

Vulnerability Publication Date: 5/21/2026

Reference Information

CVE: CVE-2026-43499